Synesthesia

Synesthesia (also spelled synæsthesia or synaesthesia, from the ancient Greek σύν [syn], "together", and αἴσθησις [aisthēsis], "sensation") is a neurological phenomenon in which stimulation of one sensory or cognitive pathway leads to automatic, involuntary experiences in a second sensory or cognitive pathway. People who report such experiences are known as synesthetes.Difficulties have been recognized in adequately defining synesthesia: many different phenomena have been included in the term synesthesia ("union of the senses"), and in many cases the terminology seems to be inaccurate. A more accurate term may be ideasthesia.

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